Key Takeaways
Summary
22 items · 30–60 minutes
Why Verification Matters Before Work Begins
Hiring a tradesperson is one of the most consequential decisions a homeowner makes. Whether you need a plumber, electrician, roofer, or general contractor, the person you let into your home will handle systems that affect your safety, your property value, and your finances. Most tradespeople are skilled and trustworthy — but a small number are not, and the consequences of a poor hire can range from shoddy workmanship to serious legal and safety problems.
The good news is that a structured verification process takes only a short time and gives you genuine confidence before any tools come out. Think of it the same way you'd approach any major decision: methodical, calm, and checklist-driven. If you're still figuring out the full scope of what your home needs, our guide on where to start when your house needs work is a useful first step.
The checklist below is organized into logical stages: background checks, credentials, quotes and contracts, and day-of confirmation. Work through each group before signing anything or handing over a deposit.
Background and Reputation
Licensing and Credentials
Insurance Verification
Quotes and Scope of Work
Permits and Compliance
Contract and Payment Terms
Tools and Resources You'll Need
You don't need specialist knowledge to verify a tradesperson — just the right resources and a little time. The tools below will help you gather and assess the information you need.
State Contractor Licensing Board Website
Use your state's official licensing board portal to verify license status, expiration date, and any disciplinary history for any tradesperson you're considering.
Insurance Certificate (COI)
Request a current Certificate of Insurance directly from the tradesperson and follow up with the insurer to confirm the policy is active.
Written Quote or Estimate
A detailed, itemized written quote forms the basis of your contract and helps you compare bids accurately.
Better Business Bureau (BBB) Lookup
Search the BBB database to see if formal complaints have been filed against the company and how they were resolved.
Local Building Department
Contact your city or county building department to confirm which permits are required for your project and whether you can verify their issuance online.
Beware of Door-to-Door Solicitations
Tradespeople who approach you unsolicited — especially after a storm or other local event — warrant extra caution. High-pressure tactics, unusually low quotes, and requests for large upfront cash payments are common warning signs. Always take time to independently verify credentials, even if the offer seems urgent. A reputable professional will not pressure you into a same-day decision.
Getting the Contract Right
A verbal agreement is rarely enough. Even for small jobs, a written contract or detailed written quote sets clear expectations and gives both parties a reference point if anything goes wrong. The contract should spell out the scope of work, materials to be used, start and completion dates, payment schedule, and what happens if unexpected issues arise mid-project.
Pay special attention to payment terms. A reasonable deposit — often in the range of 10–30% depending on project size and materials needed — is standard. Paying more than half the total cost before work is substantially complete is generally considered a risk. Structure remaining payments around verifiable milestones rather than calendar dates.
Never Skip the Written Contract
A handshake agreement or verbal commitment offers very little protection if work goes wrong, materials are substituted, or the project is abandoned. Many states legally require written contracts for home improvement work above a certain dollar threshold. Even for smaller jobs, a simple written scope of work and payment schedule protects both parties and sets clear expectations from the start.
Keep copies of all signed documents, emails, and text message exchanges. If a dispute arises, a paper trail is your most valuable asset. Check whether your state requires specific contract language for home improvement work — many do, and a contractor operating in your state should already know this.
This article provides general educational information for homeowners and does not constitute legal or financial advice. Requirements for licensing, permits, and contracts vary by state and municipality. Consult your local building department or a qualified attorney for guidance specific to your situation.